Is Bowley Lake safe to swim in?

Generally safe for swimming, moderate water quality. Bowley Lake has an overall water quality grade of C. Always check local health department advisories before swimming.

Lanark County, Ontario · Water Quality Report Card

Bowley Lake

Grade C — Fair

Eutrophic

Bowley Lake in Lanark, Ontario received a water quality grade of C (Fair). Water clarity: 1.4 m visibility. Phosphorus: 27.5 µg/L.

Clarity: 1.4 m
Type: Eutrophic

Where to stay →Safe to swim?

Bowley Lake is a productive, nutrient-rich eutrophic lake in Lanark County, Ontario. Water quality is graded C based on 2 sampling years through 2023. Compared to the 28 other monitored lakes in Lanark County, Bowley Lake ranks #29 for water quality.

Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2023-06-18. Grade methodology: LakeGrade methodology.

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 4.4 ft. Phosphorus level: 27.5 µg/L. Trophic State Index: 54.

Metric	Value	Grade
Water Clarity (Secchi Depth)	1.35 m	D
Phosphorus	27.5 µg/L	B
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	54	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Bowley Lake

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Fishing Bowley Lake

→ Bowley Lake fishing regulations (limits, seasons, special rules)

Location

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County Ranking

Ranked #29 of 29 lakes in Lanark

Cleaner Lakes Within 30 Miles

Bowley Lake holds Grade C. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Lanark

Explore Bowley Lake across LakeGrade

Lake Fishing Forecast

Species activity outlook by water temperature and season

Eutrophic Lakes

High nutrients, frequent algae, reduced clarity

The State of Ontario's Lakes

Ontario's cleanest and most-polluted lakes, ranked

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Cleanest lakes in Ontario

Top 25 by overall water quality score

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Top 25 by Secchi water clarity

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Grade A/B + low algae filter

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Panfish-rich, public access

All Ontario lakes

Full state directory

Other Grade C Lakes in Ontario

Lac Dec Chats Lake

Renfrew · 2.6 m

Unnamed Lake

Frontenac · 1.2 m

Mackay Lake

Eastern Ontario · 3 m

Troy Lake

Leeds and Grenville Counties · 1.7 m

Little Cranberry Lake

Leeds and Grenville Counties · 2.5 m

Water'S Edge Lake

Eastern Ontario · 1.2 m

Eutrophic Lakes in Ontario

Unnamed Lake Troy Lake Little Cranberry Lake Water'S Edge Lake

More records, surveys & data sources

Where this data comes from

Measurements for Bowley Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.

Data Sources

Water quality data from the EPA Water Quality Portal

Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion

Most recent sample: 2023-06-18

Monitoring stations:

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